Butt-chain block.



J. W. CARD.

BUTT CHAIN BLOCK.

APPLICATION FILED JAN. 9, 1913,

1,085,017. Patented Jan.20,1914.

COLUMBIA PLANcI PH C0..\"ASHINGTON. D. c.

JOHN W. CARD, OF CLEAR LAKE, WASHINGTON.

BUTT-CHAIN BLOCK.

Specification of Letters Patent.

Application filed January 9, 1913.

Patented J an. 20, 1914. serial No. 741,091.

To all whom it may concern Be it known that I, JOHN IV. Cano, a citi-Zen of the United States, residing at Clear Lake, in the county ofSkagit and State of Washington, have invented certain new and usefulImprovements in Butt-Chain Blocks, of which the following is aspecification.

This invention relates to improvements in butt chain blocks, and has forits object to provide a block, for the use of loggers and for similarpurposes which will permit the choker line to pass through the blockwithout becoming detached from the line.

A further object is to provide a link in one side of the block shellwhich will swing upon its central pivotal support and allow the ropesupporting the lug to pass through unobstructed.

Another object is to provide in such a device a link which is pivoted onthe central shaft and which swings freely thereon, without leavingengagement with the end portions of the shell.

I accomplish these objects by the mechanism illustrated in theaccompanying drawing, in which- Figure l is a horizontal sect-ional viewshowing the upper portions of the shell removed. Fig. 2 is alongitudinal vertical Seetional view of same.

Referring to the drawing in detail, 18 represents the shell of the blockto what may be termed the rear end of which, is secured the yoke 14, bymeans of the bolts 20. To the front end upon bolts 3, is secured theyoke 10.

In use, the block will be anchored by the cable 15, so that it will liein the position shown in Fig. 2. If it is desirable to suspend the blockabove the ground this may be done by means of cable 9 anchored in theyoke l0.

Transversely in the upper member 18, of the shell, is mounted the shaft13, having the flanged cap 19, and upon its intermediate portion ismounted in the usual manner the roll 4, against the lower end of which,upon the shaft 13 is loosely mounted the disk 6, having the radial arms6 about its periphery, and secured in place upon the enlarged journal13a by means of the flanged cap 13b.

To the lower end of yoke 10 upon bolt 3 is secured the lower member 1 ofthe shell, which is olf-set from its point of union, and extended at 1ato engage upon the lower terminal of the shaft 13, which is extended asufficient distance for that purpose.

The member 1 has a transverse channel 21 yformed at a point from thecentral axis, be-

similarly inclined inner face 2a. The lower member may be divided andthe end portion united in the usual way to the yoke.

About the disk 6 is formed a plurality of radial arms 6, each havingsecured therein at a point corresponding to said channels a pin 5, eachcarrying a roll 7 held in place by the flange 5a, and each having aninclined bearing face 7a conforming to and bearing upon the inclinedfaces 2 and 2@ of said channels. These arms will be so disposed that twoor more of them will at all times lie within the limits of the shell, sothat two or more rolls 7 will always bear against the face 2a of thechannel 22 to sust-ain the yoke 14.

In operation the main line 8 will be retracted by the engine, drawingwith it the haul back line 17 and the choker line 16, which are securedthereto by means of hooks 11 and 12 respectively. The haul back travelsover the roll 4, and the choker line, which carries t-he log, drops tothe ground. As the log approaches the block, which is always at a curvein the line, the depending choker will engage between two of the radialarms causing the disk Ga to rotate on the axis until it comes into linewith the other portion of the main line, when it will leave the arms,thus allowing the log to pass the block without obstruction and withoutthe need of detaching and reattaching the choker line, which is thepresent practice in logging. In this manner there is formed amplesupport between the shaft 13 and the yoke 14 to sustain the strain ofthe anchor 15; and the inclined faces Q. and 2a will sustain thecorresponding rolls 7 against lateral displacement.

I-Iaving described my invention, what I claim is- 1. A pulley blockhaving a divided side member, each portion having a transverse, arcuatedchannel formed about a common center, a shaft journaled in the sidemembers, a disk mounted upon said shaftI and extending beyond saidchannels, and retaining elements fixed in spaced relation about saiddisk and engaging in said channels, so as to form a connection betweenthe divided members and permit rotation of the disk.

2. A. pulley block having a divided side member, each portion having atransverse, arcuated channel formed about a common center, a shaftjournaled in the side members, a disk mounted upon said shaft andextending beyond said channels, pins fixed transversely in spacedrelation about said disk and adapted to extend into said channels, and aroller upon each of said pins adapted to engage the inner face of thechannels to connect the divided members and permit rotation of the disk.

3. In a butt chain block, a shell having a divided side member, a shaftmounted therein, a channel formed in the free portion of said sidemember about said shaft as a center, a disk journaled upon the shaft,arms ter, a disk journaled upon the shaft, arms radially disposed aboutsaid disk and extending opposite said channel, a stud secured in each ofsaid arms and adapted to extend into said channel, a roll upon each studadapted to engage the inner face of the channel, and

means to retain the roll in engagement in the channel.

In testimony whereof I affix my signature in presence of tWo Witnesses.

JOI-IN W. CARD. Witnesses:

Gr. V. MATTER, HAZEL A. ARMSTRONG.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

